Double bath towel bar



FIG. 1 is a front and top perspective view of a double bath towel bar, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the double bath towel bar that form no part of the claimed design. 

CLAIM The ornamental design for a double bath towel bar, as shown and described. 